An example for DNS over HTTPS with OkHttp for Android in Kotlin

networking.kt

object Networking {

    private val appCache = Cache(File("cacheDir", "okhttpcache"), 10 * 1024 * 1024)
    private val bootstrapClient = OkHttpClient.Builder().cache(appCache).build()
    private val dns = DnsOverHttps.Builder().client(bootstrapClient)
        .url("https://dns.google/dns-query".toHttpUrl())
        .bootstrapDnsHosts(InetAddress.getByName("8.8.4.4"), InetAddress.getByName("8.8.8.8"))
        .build()
        
    fun provideOkHttpClient(dataStorage: DataStorage): OkHttpClient {
        return OkHttpClient
            .Builder()
            .dns(dns)
            .build()
    }

}